Attachment for saw-mills



3 Sheets-Sheet 1.

(-No Model.)

B. P. ARMSTRONG. ATTAGHMENT FOR SAW MILLS.

Patented Apr. 22, 1890.

q m lmaooea (No Model.) 3,"Sheets-Sheet 2..

B. P. ARMSTRONG. ATTACHMENT FOR SAW MILLS.

No. 426,357. Patented Apr. 22, 1890.

L Jamar 25901615 07 ambc'vfl'o'o (No Model.) 3 Sheets-Sheet 3.

E. P. ARMSTRONG.

- ATTACHMENT FOR SAW MILLS.

' No. 426,357. I Patented Apr. 22, 1890.

Edwwrohj rmsiro n gvwawboz Witweooeo UNIT STATES ATENT OFFICE.

EDIVARD P. ARMSTRONG, OF SOUTH COVENTRY, CONNECTICUT.

ATTACHMENT FOR SAW-MILLS.

SPECIFICATION forming part of Letters Patent No. 426,357, dated April 22, 1890.

Application filed November 21, 1889. Serial No. 331,055. (No model.)

To (0Z5 whom it may concern.-

Be it known that I, EDWARD P. ARMSTRONG, a subject of the Queen of Great Britain, residing at South Coventry, in the county of Tolland and State of Connecticut, United States of America, have invented certain new and useful Improvements in Attachments for Saw-Mills and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form. part of this specification.

My invention relates to certain new and useful improvements in attachments for sawmills.

The object of the invention is to provide a device which is adapted to be used in connection with the saw-mill carriage, so as to deliver the logs upon the carriage, and also provide a means for turning said logs thereon;

and it consists in the combination, with a sawmill carriage, of ways or platform-extensions, said ways or extensions being provided near the ends adjacent to 'the saw-mill carriage with pivoted eccentrics, against which the log carried by the sawmill carriage will contact so that the log can be turned, and while being turned will be moved upon the carriage, as will be hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a side view of the ways, which are pivoted to the skids, said ways carrying eccentrics and means for operating said eccentrics. is a sectional view, the eccentric being shown lowered. Fig. 3 is an end view of Fig. 1. Fig. 4 is an end view of the ways, the eccentries being lowered for the passage of a log over the same; and 5 is a side view illustrating the relative position of the parts. Fi 6 is a sectional view taken 011 the line so a: of Fig. 1; and Fig. 7 is a plan view, one of the covering-plates being removed.

A refers to the skids npon'which the logs are delivered, the upper portion thereof being slightly inclined. To these skids, which are of ordinary construction, are secured, by means of pivot bolts a, the ways B, said ways having at their outer ends legs or supports to. These ways have but a limited movement Fig. 2

upon their pivot-bolts and are provided on, their upper surfaces with metallic plates A, said plates having slots through which pass the eccentrics C C. The ways B are preferably made up of two pieces of lumber c c, which are bolted to each other and cut away on their inner sides to provide an opening C, in which the eccentric C can move, said eccentric being rigidly secu red upon a rectangular shaft B, said shaft also carryinga pulley or disk (1, over which passes a chain c. The ends of the shaft B are rounded and are mounted in suitable bearings in the timbers c 0, one of said timbers being cut away to provide a space within which the pulley cl will lie.

G refers to a transverse timber or beam which connects the ways B B to each other so that they will be held rigidly together and move in unison. The ends of the timbers B B have bolted between the same a block or filling-piece, through which the upper partof the pivoted bolt a passes, said bolt extendin g downwardly through the transverse beams m at the lower end of the skid. It is only necessary that the ways B should have a lin; ited movement upon this bolt, as it is only desired to move the outer ends of the ways slightly to one side or the other, according to the diiference in diameter of the ends of the logs, so that they can be rolled into the proper position upon the saw-mill carriage F.

The saw-mill carriage is of ordinary construction and is mounted upon tracks which lead from the ways to the saw, said carriage carrying sliding knees F and operating-lever therefor, and a dog for holding the log upon the carriage, said dog having a looped or angular end which engages with the serrated portion of the sliding knees F.

As heretofore stated,each of the eccentrics C C has pulleys cl, which are mounted on the shafts D, said pulleys bein connected to the eccentrics, as well as to the shaft, and around these pulleys passes a chain or flexible connection c, which also passes over the guidepulley f and pulleys J. Beyond each the chains are each connected to a bell-crank lever D, which is pivoted to one of the end supports of the skids A. The object of the chain, pulleys, and bellcrank lever is to elevate the eccentrics C C when desired. The eccentrics ,0 C have two straight faces, which are disposed at a proper angle with each other, and the movement of the eccentrics in both directions is limited by a stop-pin h. The face of each eccentric is provided with a notch or recess i, which forms a convenient means for the engagement of a bar or lever, which can be used to assist the movement of the eccentric should assistance be necessary.

The operation of my invention is as follows: The eccentrics O O are first lowered so as to be in the position shown in Fig. 2 of the drawings, and when in this position a log is moved from the skids upon the ways B B. Now should one of the ends of the log be slightly larger than the other these ways can be shifted to be at a slight angle with the skids, which will cause the log to be placed squarely upon the saw-mill carriage. After the log has been placed on the carriage the carriage is moved to the saw and a slab cut therefrom. It will be observed that the only feature of my invention so far used is the pivoted ways for placing the log properly on the carriage. After the first slab has been removed the carriage is moved back to the ways and the cant-lever, Fig. 5, is caused to engage with the log and the same is turned so as to lie upon the face of the eccentrics G O, which have been previously raised by the operator pressing his foot upon the bell-crank lever, and as the weight of the log comes upon these eccentrics, said weight being mainly to one side of the pivots thereof, thelog is turned so'that the straight edge will rest upon the head-blocks of the saw-mill carriage, said head-blocks being parallel with the upper surface of the carriage.

This device saves a great deal of labor in turning the logs, and the services of several persons are dispensed with when this device is used. Moreover, the device is simple and is not liable to get out of order, and can be cheaply and readily applied to saw-mills of ordinary constructiomwhether circular or reciprocating saws are used Having thus described my invention I claim 1. In a saw-mill, the combination of the ways B B, pivotally attached to the skids or logways, so that the angle of the ways can be varied with respect to the saw-mill carriage and skids, together with a saw-mill carriage moving at right angles to the skids, substantially as and for the purpose set forth.

2. The pivoted ways B, carrying near their outer ends pivoted eccentrics, said eccentrics being adapted to be thrown so that the curved portion thereof will be above the ways, substantially as and for the purpose set forth.

3. The pivoted ways B B, carrying near their outer ends pivoted eccentrics, saideccentrics being adapted to be thrown so that the curved portions thereof will be above the ways, and connections e for operating said eccentrics, said connections being attached to a foot-lever D, substantially as set forth.

4. In combination with the skids A, having ways B B pivoted thereto, said ways being provided near their free ends with eccentrics O 0, two of the faces thereof being straight and adapted to engage with the pin h for limiting the movement thereof above or below the top surface of said ways B B, a saw-mill carriage adapted to be moved in front of said Ways, so that a log carried thereby will contact with the eccentrics, which assist in the turning thereof, substantially as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EDIVARD P. ARMSTRONG.

Witnesses:

E. A. LEWIS, D. J. BAILEY. 

